diff --git a/build/test/cache/defines_dependency.yml b/build/test/cache/defines_dependency.yml
index 2fbf0ff..9ce76ed 100644
--- a/build/test/cache/defines_dependency.yml
+++ b/build/test/cache/defines_dependency.yml
@@ -1 +1,3 @@
---- {}
+---
+src/main/duellist-spielesammlung-projekt.c:
+- TEST
diff --git a/build/test/cache/test_duellist_spielesammlung_projekt.c b/build/test/cache/test_duellist_spielesammlung_projekt.c
index e69de29..74c99eb 100644
--- a/build/test/cache/test_duellist_spielesammlung_projekt.c
+++ b/build/test/cache/test_duellist_spielesammlung_projekt.c
@@ -0,0 +1,509 @@
+#include "src/main/duellist-spielesammlung-projekt.h"
+#include "C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+
+
+
+
+
+
+void setUp(void) {}
+
+
+
+void tearDown(void) {}
+
+
+
+
+
+void test_coinflip_player_x_starts(void) {
+
+
+
+    TicTacToeGame game;
+
+
+
+
+
+    GameResult result = initializeGame(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((SUCCESS)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(19), UNITY_DISPLAY_STYLE_INT);
+
+    do {if ((game.currentPlayer == PLAYER_X || game.currentPlayer == PLAYER_O)) {} else {UnityFail( ((" Expected TRUE Was FALSE")), (UNITY_UINT)((UNITY_UINT)(20)));}} while(0);
+
+}
+
+
+
+void test_coinflip_player_o_starts(void) {
+
+
+
+    TicTacToeGame game;
+
+
+
+
+
+    GameResult result = initializeGame(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((SUCCESS)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(31), UNITY_DISPLAY_STYLE_INT);
+
+    do {if ((game.currentPlayer == PLAYER_X || game.currentPlayer == PLAYER_O)) {} else {UnityFail( ((" Expected TRUE Was FALSE")), (UNITY_UINT)((UNITY_UINT)(32)));}} while(0);
+
+}
+
+
+
+void test_vertical_win(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {PLAYER_X, EMPTY, EMPTY},
+
+                                     {PLAYER_X, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = checkGameResult(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((GAME_WIN)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(46), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_horizontal_win(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, PLAYER_X, PLAYER_X},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = checkGameResult(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((GAME_WIN)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(60), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+void test_diagonal_win(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_X, EMPTY},
+
+                                     {EMPTY, EMPTY, PLAYER_X}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = checkGameResult(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((GAME_WIN)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(73), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_valid_move_and_switch_player(void) {
+
+
+
+    TicTacToeGame game = { .board = {{EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_X };
+
+
+
+
+
+    GameResult moveResult = makeMove(&game, 1, 1);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((SUCCESS)), (UNITY_INT)((moveResult)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(87), UNITY_DISPLAY_STYLE_INT);
+
+    UnityAssertEqualNumber((UNITY_INT)((PLAYER_O)), (UNITY_INT)((game.currentPlayer)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(88), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+
+
+void test_invalid_input(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = makeMove(&game, 0, 0);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((INVALID_MOVE)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(103), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_valid_input(void) {
+
+
+
+    TicTacToeGame game = { .board = {{EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_X };
+
+
+
+
+
+    GameResult result = makeMove(&game, 1, 1);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((SUCCESS)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(117), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+
+
+void test_invalid_input_type1(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = makeMove(&game, -1, 0);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((INVALID_MOVE)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(132), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_invalid_input_type2(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = makeMove(&game, 0, 3);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((INVALID_MOVE)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(146), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_getNumberOfMoves_returns_correct_number_of_moves(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                           .currentPlayer = PLAYER_X };
+
+
+
+
+
+    int moves = getNumberOfMoves(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((2)), (UNITY_INT)((moves)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(160), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_BoardFull_returns_false_when_board_is_not_full(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                           .currentPlayer = PLAYER_X };
+
+
+
+
+
+    int boardFull = BoardFull(&game);
+
+
+
+
+
+    do {if (!(boardFull)) {} else {UnityFail( ((" Expected FALSE Was TRUE")), (UNITY_UINT)((UNITY_UINT)(174)));}} while(0);
+
+}
+
+void test_BoardFull_returns_true_when_board_is_full(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, PLAYER_X, PLAYER_O},
+
+                                     {PLAYER_O, PLAYER_O, PLAYER_X},
+
+                                     {PLAYER_X, PLAYER_X, PLAYER_O}},
+
+                           .currentPlayer = PLAYER_X };
+
+
+
+
+
+    int boardFull = BoardFull(&game);
+
+
+
+
+
+    do {if ((boardFull)) {} else {UnityFail( ((" Expected TRUE Was FALSE")), (UNITY_UINT)((UNITY_UINT)(187)));}} while(0);
+
+}
+
+void test_getCurrentPlayer_returns_correct_player(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                           .currentPlayer = PLAYER_O };
+
+
+
+
+
+    Player currentPlayer = getCurrentPlayer(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((PLAYER_O)), (UNITY_INT)((currentPlayer)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(200), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+void test_FieldEmpty_returns_true_for_empty_field(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}} };
+
+
+
+
+
+    int result = FieldEmpty(&game, 0, 2);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((1)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(212), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_FieldEmpty_returns_false_for_nonempty_field(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}} };
+
+
+
+
+
+    int result = FieldEmpty(&game, 0, 0);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((0)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(225), UNITY_DISPLAY_STYLE_INT);
+
+}
diff --git a/build/test/dependencies/test_duellist_spielesammlung_projekt.d b/build/test/dependencies/test_duellist_spielesammlung_projekt.d
index 598e388..96c50a9 100644
--- a/build/test/dependencies/test_duellist_spielesammlung_projekt.d
+++ b/build/test/dependencies/test_duellist_spielesammlung_projekt.d
@@ -1,2 +1,5 @@
 build/test/out/c/test_duellist_spielesammlung_projekt.o: \
- src/test/test_duellist_spielesammlung_projekt.c
+ src/test/test_duellist_spielesammlung_projekt.c \
+ C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h \
+ C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity_internals.h \
+ src/main/duellist-spielesammlung-projekt.h
diff --git a/build/test/out/c/test_duellist_spielesammlung_projekt.o b/build/test/out/c/test_duellist_spielesammlung_projekt.o
index 61d37cc..7bf0ec4 100644
Binary files a/build/test/out/c/test_duellist_spielesammlung_projekt.o and b/build/test/out/c/test_duellist_spielesammlung_projekt.o differ
diff --git a/build/test/out/c/test_duellist_spielesammlung_projekt_runner.o b/build/test/out/c/test_duellist_spielesammlung_projekt_runner.o
index 70dfa74..02e689f 100644
Binary files a/build/test/out/c/test_duellist_spielesammlung_projekt_runner.o and b/build/test/out/c/test_duellist_spielesammlung_projekt_runner.o differ
diff --git a/build/test/preprocess/files/test_duellist_spielesammlung_projekt.c b/build/test/preprocess/files/test_duellist_spielesammlung_projekt.c
index e69de29..74c99eb 100644
--- a/build/test/preprocess/files/test_duellist_spielesammlung_projekt.c
+++ b/build/test/preprocess/files/test_duellist_spielesammlung_projekt.c
@@ -0,0 +1,509 @@
+#include "src/main/duellist-spielesammlung-projekt.h"
+#include "C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+
+
+
+
+
+
+void setUp(void) {}
+
+
+
+void tearDown(void) {}
+
+
+
+
+
+void test_coinflip_player_x_starts(void) {
+
+
+
+    TicTacToeGame game;
+
+
+
+
+
+    GameResult result = initializeGame(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((SUCCESS)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(19), UNITY_DISPLAY_STYLE_INT);
+
+    do {if ((game.currentPlayer == PLAYER_X || game.currentPlayer == PLAYER_O)) {} else {UnityFail( ((" Expected TRUE Was FALSE")), (UNITY_UINT)((UNITY_UINT)(20)));}} while(0);
+
+}
+
+
+
+void test_coinflip_player_o_starts(void) {
+
+
+
+    TicTacToeGame game;
+
+
+
+
+
+    GameResult result = initializeGame(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((SUCCESS)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(31), UNITY_DISPLAY_STYLE_INT);
+
+    do {if ((game.currentPlayer == PLAYER_X || game.currentPlayer == PLAYER_O)) {} else {UnityFail( ((" Expected TRUE Was FALSE")), (UNITY_UINT)((UNITY_UINT)(32)));}} while(0);
+
+}
+
+
+
+void test_vertical_win(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {PLAYER_X, EMPTY, EMPTY},
+
+                                     {PLAYER_X, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = checkGameResult(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((GAME_WIN)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(46), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_horizontal_win(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, PLAYER_X, PLAYER_X},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = checkGameResult(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((GAME_WIN)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(60), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+void test_diagonal_win(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_X, EMPTY},
+
+                                     {EMPTY, EMPTY, PLAYER_X}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = checkGameResult(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((GAME_WIN)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(73), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_valid_move_and_switch_player(void) {
+
+
+
+    TicTacToeGame game = { .board = {{EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_X };
+
+
+
+
+
+    GameResult moveResult = makeMove(&game, 1, 1);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((SUCCESS)), (UNITY_INT)((moveResult)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(87), UNITY_DISPLAY_STYLE_INT);
+
+    UnityAssertEqualNumber((UNITY_INT)((PLAYER_O)), (UNITY_INT)((game.currentPlayer)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(88), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+
+
+void test_invalid_input(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = makeMove(&game, 0, 0);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((INVALID_MOVE)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(103), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_valid_input(void) {
+
+
+
+    TicTacToeGame game = { .board = {{EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_X };
+
+
+
+
+
+    GameResult result = makeMove(&game, 1, 1);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((SUCCESS)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(117), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+
+
+void test_invalid_input_type1(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = makeMove(&game, -1, 0);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((INVALID_MOVE)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(132), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_invalid_input_type2(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                          .currentPlayer = PLAYER_O };
+
+
+
+
+
+    GameResult result = makeMove(&game, 0, 3);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((INVALID_MOVE)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(146), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_getNumberOfMoves_returns_correct_number_of_moves(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                           .currentPlayer = PLAYER_X };
+
+
+
+
+
+    int moves = getNumberOfMoves(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((2)), (UNITY_INT)((moves)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(160), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_BoardFull_returns_false_when_board_is_not_full(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                           .currentPlayer = PLAYER_X };
+
+
+
+
+
+    int boardFull = BoardFull(&game);
+
+
+
+
+
+    do {if (!(boardFull)) {} else {UnityFail( ((" Expected FALSE Was TRUE")), (UNITY_UINT)((UNITY_UINT)(174)));}} while(0);
+
+}
+
+void test_BoardFull_returns_true_when_board_is_full(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, PLAYER_X, PLAYER_O},
+
+                                     {PLAYER_O, PLAYER_O, PLAYER_X},
+
+                                     {PLAYER_X, PLAYER_X, PLAYER_O}},
+
+                           .currentPlayer = PLAYER_X };
+
+
+
+
+
+    int boardFull = BoardFull(&game);
+
+
+
+
+
+    do {if ((boardFull)) {} else {UnityFail( ((" Expected TRUE Was FALSE")), (UNITY_UINT)((UNITY_UINT)(187)));}} while(0);
+
+}
+
+void test_getCurrentPlayer_returns_correct_player(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}},
+
+                           .currentPlayer = PLAYER_O };
+
+
+
+
+
+    Player currentPlayer = getCurrentPlayer(&game);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((PLAYER_O)), (UNITY_INT)((currentPlayer)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(200), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+void test_FieldEmpty_returns_true_for_empty_field(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}} };
+
+
+
+
+
+    int result = FieldEmpty(&game, 0, 2);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((1)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(212), UNITY_DISPLAY_STYLE_INT);
+
+}
+
+
+
+void test_FieldEmpty_returns_false_for_nonempty_field(void) {
+
+
+
+    TicTacToeGame game = { .board = {{PLAYER_X, EMPTY, EMPTY},
+
+                                     {EMPTY, PLAYER_O, EMPTY},
+
+                                     {EMPTY, EMPTY, EMPTY}} };
+
+
+
+
+
+    int result = FieldEmpty(&game, 0, 0);
+
+
+
+
+
+    UnityAssertEqualNumber((UNITY_INT)((0)), (UNITY_INT)((result)), (
+
+   ((void *)0)
+
+   ), (UNITY_UINT)(225), UNITY_DISPLAY_STYLE_INT);
+
+}
diff --git a/build/test/preprocess/includes/test_duellist_spielesammlung_projekt.c b/build/test/preprocess/includes/test_duellist_spielesammlung_projekt.c
index dcd024e..c5516ae 100644
--- a/build/test/preprocess/includes/test_duellist_spielesammlung_projekt.c
+++ b/build/test/preprocess/includes/test_duellist_spielesammlung_projekt.c
@@ -1 +1,3 @@
---- []
+---
+- C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h
+- src/main/duellist-spielesammlung-projekt.h
diff --git a/build/test/results/test_duellist_spielesammlung_projekt.pass b/build/test/results/test_duellist_spielesammlung_projekt.pass
deleted file mode 100644
index 5046e33..0000000
--- a/build/test/results/test_duellist_spielesammlung_projekt.pass
+++ /dev/null
@@ -1,14 +0,0 @@
----
-:source:
-  :path: src/test
-  :file: test_duellist_spielesammlung_projekt.c
-:successes: []
-:failures: []
-:ignores: []
-:counts:
-  :total: 0
-  :passed: 0
-  :failed: 0
-  :ignored: 0
-:stdout: []
-:time: 0.014711899915710092
diff --git a/build/test/runners/test_duellist_spielesammlung_projekt_runner.c b/build/test/runners/test_duellist_spielesammlung_projekt_runner.c
index bba31ca..f4e3d01 100644
--- a/build/test/runners/test_duellist_spielesammlung_projekt_runner.c
+++ b/build/test/runners/test_duellist_spielesammlung_projekt_runner.c
@@ -10,6 +10,22 @@ char* GlobalOrderError;
 /*=======External Functions This Runner Calls=====*/
 extern void setUp(void);
 extern void tearDown(void);
+extern void test_coinflip_player_x_starts(void);
+extern void test_coinflip_player_o_starts(void);
+extern void test_vertical_win(void);
+extern void test_horizontal_win(void);
+extern void test_diagonal_win(void);
+extern void test_valid_move_and_switch_player(void);
+extern void test_invalid_input(void);
+extern void test_valid_input(void);
+extern void test_invalid_input_type1(void);
+extern void test_invalid_input_type2(void);
+extern void test_getNumberOfMoves_returns_correct_number_of_moves(void);
+extern void test_BoardFull_returns_false_when_board_is_not_full(void);
+extern void test_BoardFull_returns_true_when_board_is_full(void);
+extern void test_getCurrentPlayer_returns_correct_player(void);
+extern void test_FieldEmpty_returns_true_for_empty_field(void);
+extern void test_FieldEmpty_returns_false_for_nonempty_field(void);
 
 
 /*=======Mock Management=====*/
@@ -26,12 +42,6 @@ static void CMock_Destroy(void)
 {
 }
 
-/*=======Setup (stub)=====*/
-void setUp(void) {}
-
-/*=======Teardown (stub)=====*/
-void tearDown(void) {}
-
 /*=======Test Reset Options=====*/
 void resetTest(void);
 void resetTest(void)
@@ -48,10 +58,54 @@ void verifyTest(void)
   CMock_Verify();
 }
 
+/*=======Test Runner Used To Run Each Test=====*/
+static void run_test(UnityTestFunction func, const char* name, UNITY_LINE_TYPE line_num)
+{
+    Unity.CurrentTestName = name;
+    Unity.CurrentTestLineNumber = line_num;
+#ifdef UNITY_USE_COMMAND_LINE_ARGS
+    if (!UnityTestMatches())
+        return;
+#endif
+    Unity.NumberOfTests++;
+    UNITY_CLR_DETAILS();
+    UNITY_EXEC_TIME_START();
+    CMock_Init();
+    if (TEST_PROTECT())
+    {
+        setUp();
+        func();
+    }
+    if (TEST_PROTECT())
+    {
+        tearDown();
+        CMock_Verify();
+    }
+    CMock_Destroy();
+    UNITY_EXEC_TIME_STOP();
+    UnityConcludeTest();
+}
+
 /*=======MAIN=====*/
 int main(void)
 {
   UnityBegin("test_duellist_spielesammlung_projekt.c");
+  run_test(test_coinflip_player_x_starts, "test_coinflip_player_x_starts", 11);
+  run_test(test_coinflip_player_o_starts, "test_coinflip_player_o_starts", 23);
+  run_test(test_vertical_win, "test_vertical_win", 35);
+  run_test(test_horizontal_win, "test_horizontal_win", 49);
+  run_test(test_diagonal_win, "test_diagonal_win", 62);
+  run_test(test_valid_move_and_switch_player, "test_valid_move_and_switch_player", 76);
+  run_test(test_invalid_input, "test_invalid_input", 92);
+  run_test(test_valid_input, "test_valid_input", 106);
+  run_test(test_invalid_input_type1, "test_invalid_input_type1", 121);
+  run_test(test_invalid_input_type2, "test_invalid_input_type2", 135);
+  run_test(test_getNumberOfMoves_returns_correct_number_of_moves, "test_getNumberOfMoves_returns_correct_number_of_moves", 149);
+  run_test(test_BoardFull_returns_false_when_board_is_not_full, "test_BoardFull_returns_false_when_board_is_not_full", 163);
+  run_test(test_BoardFull_returns_true_when_board_is_full, "test_BoardFull_returns_true_when_board_is_full", 176);
+  run_test(test_getCurrentPlayer_returns_correct_player, "test_getCurrentPlayer_returns_correct_player", 189);
+  run_test(test_FieldEmpty_returns_true_for_empty_field, "test_FieldEmpty_returns_true_for_empty_field", 202);
+  run_test(test_FieldEmpty_returns_false_for_nonempty_field, "test_FieldEmpty_returns_false_for_nonempty_field", 215);
 
   return UnityEnd();
 }
diff --git a/src/main/duellist-spielesammlung-projekt.c b/src/main/duellist-spielesammlung-projekt.c
index 4267153..63b1395 100644
--- a/src/main/duellist-spielesammlung-projekt.c
+++ b/src/main/duellist-spielesammlung-projekt.c
@@ -106,16 +106,22 @@ int FieldEmpty(const TicTacToeGame* game, int row, int col) {
 }
 
 GameResult checkGameResult(const TicTacToeGame* game) {
-    // Prüfen, ob ein Sieg oder ein Unentschieden vorliegt und das entsprechende Ergebnis zurückgeben
+    // Überprüfen, ob ein Sieg oder ein Unentschieden vorliegt und das entsprechende Ergebnis zurückgeben
     for (int i = 0; i < 3; ++i) {
-        //Zeilen und Spalten auf einen Gewinn prüfen
+        // Zeilen und Spalten auf einen Gewinn prüfen
         if ((game->board[i][0] == game->board[i][1] && game->board[i][1] == game->board[i][2] && game->board[i][0] != EMPTY) ||
             (game->board[0][i] == game->board[1][i] && game->board[1][i] == game->board[2][i] && game->board[0][i] != EMPTY)) {
             return GAME_WIN;
         }
     }
 
-   
+    // Diagonalen auf einen Gewinn prüfen
+    if ((game->board[0][0] == game->board[1][1] && game->board[1][1] == game->board[2][2] && game->board[0][0] != EMPTY) ||
+        (game->board[0][2] == game->board[1][1] && game->board[1][1] == game->board[2][0] && game->board[0][2] != EMPTY)) {
+        return GAME_WIN;
+    }
+
+    // Überprüfen auf Unentschieden
     int draw = 1;
     for (int i = 0; i < 3; ++i) {
         for (int j = 0; j < 3; ++j) {
diff --git a/src/main/duellist-spielesammlung-projekt.h b/src/main/duellist-spielesammlung-projekt.h
index 63f6ef9..514eff2 100644
--- a/src/main/duellist-spielesammlung-projekt.h
+++ b/src/main/duellist-spielesammlung-projekt.h
@@ -1,6 +1,9 @@
 #ifndef DUELLIST_SPIELESAMMLUNG_PROJEKT_H
 #define DUELLIST_SPIELESAMMLUNG_PROJEKT_H
 
+#define MIN_AGE 12
+
+
 
 typedef enum {
     SUCCESS,